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-rw-r--r--sound/soc/codecs/hdmi-codec.c826
1 files changed, 826 insertions, 0 deletions
diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
new file mode 100644
index 000000000..7994e8ddc
--- /dev/null
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -0,0 +1,826 @@
+/*
+ * ALSA SoC codec for HDMI encoder drivers
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Jyri Sarha <jsarha@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+#include <linux/module.h>
+#include <linux/string.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+#include <sound/pcm_drm_eld.h>
+#include <sound/hdmi-codec.h>
+#include <sound/pcm_iec958.h>
+
+#include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
+
+#define HDMI_CODEC_CHMAP_IDX_UNKNOWN -1
+
+struct hdmi_codec_channel_map_table {
+ unsigned char map; /* ALSA API channel map position */
+ unsigned long spk_mask; /* speaker position bit mask */
+};
+
+/*
+ * CEA speaker placement for HDMI 1.4:
+ *
+ * FL FLC FC FRC FR FRW
+ *
+ * LFE
+ *
+ * RL RLC RC RRC RR
+ *
+ * Speaker placement has to be extended to support HDMI 2.0
+ */
+enum hdmi_codec_cea_spk_placement {
+ FL = BIT(0), /* Front Left */
+ FC = BIT(1), /* Front Center */
+ FR = BIT(2), /* Front Right */
+ FLC = BIT(3), /* Front Left Center */
+ FRC = BIT(4), /* Front Right Center */
+ RL = BIT(5), /* Rear Left */
+ RC = BIT(6), /* Rear Center */
+ RR = BIT(7), /* Rear Right */
+ RLC = BIT(8), /* Rear Left Center */
+ RRC = BIT(9), /* Rear Right Center */
+ LFE = BIT(10), /* Low Frequency Effect */
+};
+
+/*
+ * cea Speaker allocation structure
+ */
+struct hdmi_codec_cea_spk_alloc {
+ const int ca_id;
+ unsigned int n_ch;
+ unsigned long mask;
+};
+
+/* Channel maps stereo HDMI */
+static const struct snd_pcm_chmap_elem hdmi_codec_stereo_chmaps[] = {
+ { .channels = 2,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
+ { }
+};
+
+/* Channel maps for multi-channel playbacks, up to 8 n_ch */
+static const struct snd_pcm_chmap_elem hdmi_codec_8ch_chmaps[] = {
+ { .channels = 2, /* CA_ID 0x00 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
+ { .channels = 4, /* CA_ID 0x01 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA } },
+ { .channels = 4, /* CA_ID 0x02 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC } },
+ { .channels = 4, /* CA_ID 0x03 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC } },
+ { .channels = 6, /* CA_ID 0x04 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 6, /* CA_ID 0x05 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 6, /* CA_ID 0x06 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 6, /* CA_ID 0x07 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 6, /* CA_ID 0x08 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { .channels = 6, /* CA_ID 0x09 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { .channels = 6, /* CA_ID 0x0A */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { .channels = 6, /* CA_ID 0x0B */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
+ { .channels = 8, /* CA_ID 0x0C */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 8, /* CA_ID 0x0D */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 8, /* CA_ID 0x0E */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 8, /* CA_ID 0x0F */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
+ { .channels = 8, /* CA_ID 0x10 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
+ { .channels = 8, /* CA_ID 0x11 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
+ { .channels = 8, /* CA_ID 0x12 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
+ { .channels = 8, /* CA_ID 0x13 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
+ SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
+ { .channels = 8, /* CA_ID 0x14 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x15 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x16 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x17 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x18 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x19 */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1A */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1B */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1C */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1D */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1E */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { .channels = 8, /* CA_ID 0x1F */
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
+ SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
+ SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
+ { }
+};
+
+/*
+ * hdmi_codec_channel_alloc: speaker configuration available for CEA
+ *
+ * This is an ordered list that must match with hdmi_codec_8ch_chmaps struct
+ * The preceding ones have better chances to be selected by
+ * hdmi_codec_get_ch_alloc_table_idx().
+ */
+static const struct hdmi_codec_cea_spk_alloc hdmi_codec_channel_alloc[] = {
+ { .ca_id = 0x00, .n_ch = 2,
+ .mask = FL | FR},
+ /* 2.1 */
+ { .ca_id = 0x01, .n_ch = 4,
+ .mask = FL | FR | LFE},
+ /* Dolby Surround */
+ { .ca_id = 0x02, .n_ch = 4,
+ .mask = FL | FR | FC },
+ /* surround51 */
+ { .ca_id = 0x0b, .n_ch = 6,
+ .mask = FL | FR | LFE | FC | RL | RR},
+ /* surround40 */
+ { .ca_id = 0x08, .n_ch = 6,
+ .mask = FL | FR | RL | RR },
+ /* surround41 */
+ { .ca_id = 0x09, .n_ch = 6,
+ .mask = FL | FR | LFE | RL | RR },
+ /* surround50 */
+ { .ca_id = 0x0a, .n_ch = 6,
+ .mask = FL | FR | FC | RL | RR },
+ /* 6.1 */
+ { .ca_id = 0x0f, .n_ch = 8,
+ .mask = FL | FR | LFE | FC | RL | RR | RC },
+ /* surround71 */
+ { .ca_id = 0x13, .n_ch = 8,
+ .mask = FL | FR | LFE | FC | RL | RR | RLC | RRC },
+ /* others */
+ { .ca_id = 0x03, .n_ch = 8,
+ .mask = FL | FR | LFE | FC },
+ { .ca_id = 0x04, .n_ch = 8,
+ .mask = FL | FR | RC},
+ { .ca_id = 0x05, .n_ch = 8,
+ .mask = FL | FR | LFE | RC },
+ { .ca_id = 0x06, .n_ch = 8,
+ .mask = FL | FR | FC | RC },
+ { .ca_id = 0x07, .n_ch = 8,
+ .mask = FL | FR | LFE | FC | RC },
+ { .ca_id = 0x0c, .n_ch = 8,
+ .mask = FL | FR | RC | RL | RR },
+ { .ca_id = 0x0d, .n_ch = 8,
+ .mask = FL | FR | LFE | RL | RR | RC },
+ { .ca_id = 0x0e, .n_ch = 8,
+ .mask = FL | FR | FC | RL | RR | RC },
+ { .ca_id = 0x10, .n_ch = 8,
+ .mask = FL | FR | RL | RR | RLC | RRC },
+ { .ca_id = 0x11, .n_ch = 8,
+ .mask = FL | FR | LFE | RL | RR | RLC | RRC },
+ { .ca_id = 0x12, .n_ch = 8,
+ .mask = FL | FR | FC | RL | RR | RLC | RRC },
+ { .ca_id = 0x14, .n_ch = 8,
+ .mask = FL | FR | FLC | FRC },
+ { .ca_id = 0x15, .n_ch = 8,
+ .mask = FL | FR | LFE | FLC | FRC },
+ { .ca_id = 0x16, .n_ch = 8,
+ .mask = FL | FR | FC | FLC | FRC },
+ { .ca_id = 0x17, .n_ch = 8,
+ .mask = FL | FR | LFE | FC | FLC | FRC },
+ { .ca_id = 0x18, .n_ch = 8,
+ .mask = FL | FR | RC | FLC | FRC },
+ { .ca_id = 0x19, .n_ch = 8,
+ .mask = FL | FR | LFE | RC | FLC | FRC },
+ { .ca_id = 0x1a, .n_ch = 8,
+ .mask = FL | FR | RC | FC | FLC | FRC },
+ { .ca_id = 0x1b, .n_ch = 8,
+ .mask = FL | FR | LFE | RC | FC | FLC | FRC },
+ { .ca_id = 0x1c, .n_ch = 8,
+ .mask = FL | FR | RL | RR | FLC | FRC },
+ { .ca_id = 0x1d, .n_ch = 8,
+ .mask = FL | FR | LFE | RL | RR | FLC | FRC },
+ { .ca_id = 0x1e, .n_ch = 8,
+ .mask = FL | FR | FC | RL | RR | FLC | FRC },
+ { .ca_id = 0x1f, .n_ch = 8,
+ .mask = FL | FR | LFE | FC | RL | RR | FLC | FRC },
+};
+
+struct hdmi_codec_priv {
+ struct hdmi_codec_pdata hcd;
+ struct snd_soc_dai_driver *daidrv;
+ struct hdmi_codec_daifmt daifmt[2];
+ struct mutex current_stream_lock;
+ struct snd_pcm_substream *current_stream;
+ uint8_t eld[MAX_ELD_BYTES];
+ struct snd_pcm_chmap *chmap_info;
+ unsigned int chmap_idx;
+};
+
+static const struct snd_soc_dapm_widget hdmi_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+enum {
+ DAI_ID_I2S = 0,
+ DAI_ID_SPDIF,
+};
+
+static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+ uinfo->count = FIELD_SIZEOF(struct hdmi_codec_priv, eld);
+
+ return 0;
+}
+
+static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+ struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
+
+ memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
+
+ return 0;
+}
+
+static unsigned long hdmi_codec_spk_mask_from_alloc(int spk_alloc)
+{
+ int i;
+ static const unsigned long hdmi_codec_eld_spk_alloc_bits[] = {
+ [0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR,
+ [4] = RC, [5] = FLC | FRC, [6] = RLC | RRC,
+ };
+ unsigned long spk_mask = 0;
+
+ for (i = 0; i < ARRAY_SIZE(hdmi_codec_eld_spk_alloc_bits); i++) {
+ if (spk_alloc & (1 << i))
+ spk_mask |= hdmi_codec_eld_spk_alloc_bits[i];
+ }
+
+ return spk_mask;
+}
+
+static void hdmi_codec_eld_chmap(struct hdmi_codec_priv *hcp)
+{
+ u8 spk_alloc;
+ unsigned long spk_mask;
+
+ spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
+ spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
+
+ /* Detect if only stereo supported, else return 8 channels mappings */
+ if ((spk_mask & ~(FL | FR)) && hcp->chmap_info->max_channels > 2)
+ hcp->chmap_info->chmap = hdmi_codec_8ch_chmaps;
+ else
+ hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
+}
+
+static int hdmi_codec_get_ch_alloc_table_idx(struct hdmi_codec_priv *hcp,
+ unsigned char channels)
+{
+ int i;
+ u8 spk_alloc;
+ unsigned long spk_mask;
+ const struct hdmi_codec_cea_spk_alloc *cap = hdmi_codec_channel_alloc;
+
+ spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
+ spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);
+
+ for (i = 0; i < ARRAY_SIZE(hdmi_codec_channel_alloc); i++, cap++) {
+ /* If spk_alloc == 0, HDMI is unplugged return stereo config*/
+ if (!spk_alloc && cap->ca_id == 0)
+ return i;
+ if (cap->n_ch != channels)
+ continue;
+ if (!(cap->mask == (spk_mask & cap->mask)))
+ continue;
+ return i;
+ }
+
+ return -EINVAL;
+}
+static int hdmi_codec_chmap_ctl_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ unsigned const char *map;
+ unsigned int i;
+ struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
+ struct hdmi_codec_priv *hcp = info->private_data;
+
+ map = info->chmap[hcp->chmap_idx].map;
+
+ for (i = 0; i < info->max_channels; i++) {
+ if (hcp->chmap_idx == HDMI_CODEC_CHMAP_IDX_UNKNOWN)
+ ucontrol->value.integer.value[i] = 0;
+ else
+ ucontrol->value.integer.value[i] = map[i];
+ }
+
+ return 0;
+}
+
+static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
+ int ret = 0;
+
+ mutex_lock(&hcp->current_stream_lock);
+ if (!hcp->current_stream) {
+ hcp->current_stream = substream;
+ } else if (hcp->current_stream != substream) {
+ dev_err(dai->dev, "Only one simultaneous stream supported!\n");
+ ret = -EINVAL;
+ }
+ mutex_unlock(&hcp->current_stream_lock);
+
+ return ret;
+}
+
+static int hdmi_codec_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
+ int ret = 0;
+
+ dev_dbg(dai->dev, "%s()\n", __func__);
+
+ ret = hdmi_codec_new_stream(substream, dai);
+ if (ret)
+ return ret;
+
+ if (hcp->hcd.ops->audio_startup) {
+ ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
+ if (ret) {
+ mutex_lock(&hcp->current_stream_lock);
+ hcp->current_stream = NULL;
+ mutex_unlock(&hcp->current_stream_lock);
+ return ret;
+ }
+ }
+
+ if (hcp->hcd.ops->get_eld) {
+ ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
+ hcp->eld, sizeof(hcp->eld));
+
+ if (!ret) {
+ ret = snd_pcm_hw_constraint_eld(substream->runtime,
+ hcp->eld);
+ if (ret) {
+ mutex_lock(&hcp->current_stream_lock);
+ hcp->current_stream = NULL;
+ mutex_unlock(&hcp->current_stream_lock);
+ return ret;
+ }
+ }
+ /* Select chmap supported */
+ hdmi_codec_eld_chmap(hcp);
+ }
+ return 0;
+}
+
+static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
+
+ dev_dbg(dai->dev, "%s()\n", __func__);
+
+ WARN_ON(hcp->current_stream != substream);
+
+ hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
+ hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
+
+ mutex_lock(&hcp->current_stream_lock);
+ hcp->current_stream = NULL;
+ mutex_unlock(&hcp->current_stream_lock);
+}
+
+static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
+ struct hdmi_codec_params hp = {
+ .iec = {
+ .status = { 0 },
+ .subcode = { 0 },
+ .pad = 0,
+ .dig_subframe = { 0 },
+ }
+ };
+ int ret, idx;
+
+ dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
+ params_width(params), params_rate(params),
+ params_channels(params));
+
+ if (params_width(params) > 24)
+ params->msbits = 24;
+
+ ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status,
+ sizeof(hp.iec.status));
+ if (ret < 0) {
+ dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = hdmi_codec_new_stream(substream, dai);
+ if (ret)
+ return ret;
+
+ hdmi_audio_infoframe_init(&hp.cea);
+ hp.cea.channels = params_channels(params);
+ hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
+ hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
+ hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
+
+ /* Select a channel allocation that matches with ELD and pcm channels */
+ idx = hdmi_codec_get_ch_alloc_table_idx(hcp, hp.cea.channels);
+ if (idx < 0) {
+ dev_err(dai->dev, "Not able to map channels to speakers (%d)\n",
+ idx);
+ hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
+ return idx;
+ }
+ hp.cea.channel_allocation = hdmi_codec_channel_alloc[idx].ca_id;
+ hcp->chmap_idx = hdmi_codec_channel_alloc[idx].ca_id;
+
+ hp.sample_width = params_width(params);
+ hp.sample_rate = params_rate(params);
+ hp.channels = params_channels(params);
+
+ return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
+ &hcp->daifmt[dai->id], &hp);
+}
+
+static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
+ unsigned int fmt)
+{
+ struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
+ struct hdmi_codec_daifmt cf = { 0 };
+
+ dev_dbg(dai->dev, "%s()\n", __func__);
+
+ if (dai->id == DAI_ID_SPDIF)
+ return 0;
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ cf.bit_clk_master = 1;
+ cf.frame_clk_master = 1;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFM:
+ cf.frame_clk_master = 1;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFS:
+ cf.bit_clk_master = 1;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ cf.frame_clk_inv = 1;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ cf.bit_clk_inv = 1;
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ cf.frame_clk_inv = 1;
+ cf.bit_clk_inv = 1;
+ break;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ cf.fmt = HDMI_I2S;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ cf.fmt = HDMI_DSP_A;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ cf.fmt = HDMI_DSP_B;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ cf.fmt = HDMI_RIGHT_J;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ cf.fmt = HDMI_LEFT_J;
+ break;
+ case SND_SOC_DAIFMT_AC97:
+ cf.fmt = HDMI_AC97;
+ break;
+ default:
+ dev_err(dai->dev, "Invalid DAI interface format\n");
+ return -EINVAL;
+ }
+
+ hcp->daifmt[dai->id] = cf;
+
+ return 0;
+}
+
+static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
+
+ dev_dbg(dai->dev, "%s()\n", __func__);
+
+ if (hcp->hcd.ops->digital_mute)
+ return hcp->hcd.ops->digital_mute(dai->dev->parent,
+ hcp->hcd.data, mute);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops hdmi_dai_ops = {
+ .startup = hdmi_codec_startup,
+ .shutdown = hdmi_codec_shutdown,
+ .hw_params = hdmi_codec_hw_params,
+ .set_fmt = hdmi_codec_set_fmt,
+ .digital_mute = hdmi_codec_digital_mute,
+};
+
+
+#define HDMI_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
+ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
+ SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
+ SNDRV_PCM_RATE_192000)
+
+#define SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
+ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
+ SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
+
+/*
+ * This list is only for formats allowed on the I2S bus. So there is
+ * some formats listed that are not supported by HDMI interface. For
+ * instance allowing the 32-bit formats enables 24-precision with CPU
+ * DAIs that do not support 24-bit formats. If the extra formats cause
+ * problems, we should add the video side driver an option to disable
+ * them.
+ */
+#define I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
+ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
+ SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
+ SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)
+
+static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_dai_driver *drv = dai->driver;
+ struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
+ struct snd_kcontrol *kctl;
+ struct snd_kcontrol_new hdmi_eld_ctl = {
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "ELD",
+ .info = hdmi_eld_ctl_info,
+ .get = hdmi_eld_ctl_get,
+ .device = rtd->pcm->device,
+ };
+ int ret;
+
+ dev_dbg(dai->dev, "%s()\n", __func__);
+
+ ret = snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ NULL, drv->playback.channels_max, 0,
+ &hcp->chmap_info);
+ if (ret < 0)
+ return ret;
+
+ /* override handlers */
+ hcp->chmap_info->private_data = hcp;
+ hcp->chmap_info->kctl->get = hdmi_codec_chmap_ctl_get;
+
+ /* default chmap supported is stereo */
+ hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
+ hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
+
+ /* add ELD ctl with the device number corresponding to the PCM stream */
+ kctl = snd_ctl_new1(&hdmi_eld_ctl, dai->component);
+ if (!kctl)
+ return -ENOMEM;
+
+ return snd_ctl_add(rtd->card->snd_card, kctl);
+}
+
+static int hdmi_dai_probe(struct snd_soc_dai *dai)
+{
+ struct snd_soc_dapm_context *dapm;
+ struct snd_soc_dapm_route route = {
+ .sink = "TX",
+ .source = dai->driver->playback.stream_name,
+ };
+
+ dapm = snd_soc_component_get_dapm(dai->component);
+
+ return snd_soc_dapm_add_routes(dapm, &route, 1);
+}
+
+static const struct snd_soc_dai_driver hdmi_i2s_dai = {
+ .name = "i2s-hifi",
+ .id = DAI_ID_I2S,
+ .probe = hdmi_dai_probe,
+ .playback = {
+ .stream_name = "I2S Playback",
+ .channels_min = 2,
+ .channels_max = 8,
+ .rates = HDMI_RATES,
+ .formats = I2S_FORMATS,
+ .sig_bits = 24,
+ },
+ .ops = &hdmi_dai_ops,
+ .pcm_new = hdmi_codec_pcm_new,
+};
+
+static const struct snd_soc_dai_driver hdmi_spdif_dai = {
+ .name = "spdif-hifi",
+ .id = DAI_ID_SPDIF,
+ .probe = hdmi_dai_probe,
+ .playback = {
+ .stream_name = "SPDIF Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = HDMI_RATES,
+ .formats = SPDIF_FORMATS,
+ },
+ .ops = &hdmi_dai_ops,
+ .pcm_new = hdmi_codec_pcm_new,
+};
+
+static int hdmi_of_xlate_dai_id(struct snd_soc_component *component,
+ struct device_node *endpoint)
+{
+ struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
+ int ret = -ENOTSUPP; /* see snd_soc_get_dai_id() */
+
+ if (hcp->hcd.ops->get_dai_id)
+ ret = hcp->hcd.ops->get_dai_id(component, endpoint);
+
+ return ret;
+}
+
+static const struct snd_soc_component_driver hdmi_driver = {
+ .dapm_widgets = hdmi_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(hdmi_widgets),
+ .of_xlate_dai_id = hdmi_of_xlate_dai_id,
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .endianness = 1,
+ .non_legacy_dai_naming = 1,
+};
+
+static int hdmi_codec_probe(struct platform_device *pdev)
+{
+ struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
+ struct device *dev = &pdev->dev;
+ struct hdmi_codec_priv *hcp;
+ int dai_count, i = 0;
+ int ret;
+
+ dev_dbg(dev, "%s()\n", __func__);
+
+ if (!hcd) {
+ dev_err(dev, "%s: No plalform data\n", __func__);
+ return -EINVAL;
+ }
+
+ dai_count = hcd->i2s + hcd->spdif;
+ if (dai_count < 1 || !hcd->ops || !hcd->ops->hw_params ||
+ !hcd->ops->audio_shutdown) {
+ dev_err(dev, "%s: Invalid parameters\n", __func__);
+ return -EINVAL;
+ }
+
+ hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
+ if (!hcp)
+ return -ENOMEM;
+
+ hcp->hcd = *hcd;
+ mutex_init(&hcp->current_stream_lock);
+
+ hcp->daidrv = devm_kcalloc(dev, dai_count, sizeof(*hcp->daidrv),
+ GFP_KERNEL);
+ if (!hcp->daidrv)
+ return -ENOMEM;
+
+ if (hcd->i2s) {
+ hcp->daidrv[i] = hdmi_i2s_dai;
+ hcp->daidrv[i].playback.channels_max =
+ hcd->max_i2s_channels;
+ i++;
+ }
+
+ if (hcd->spdif) {
+ hcp->daidrv[i] = hdmi_spdif_dai;
+ hcp->daifmt[DAI_ID_SPDIF].fmt = HDMI_SPDIF;
+ }
+
+ dev_set_drvdata(dev, hcp);
+
+ ret = devm_snd_soc_register_component(dev, &hdmi_driver, hcp->daidrv,
+ dai_count);
+ if (ret) {
+ dev_err(dev, "%s: snd_soc_register_component() failed (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+ return 0;
+}
+
+static struct platform_driver hdmi_codec_driver = {
+ .driver = {
+ .name = HDMI_CODEC_DRV_NAME,
+ },
+ .probe = hdmi_codec_probe,
+};
+
+module_platform_driver(hdmi_codec_driver);
+
+MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
+MODULE_DESCRIPTION("HDMI Audio Codec Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 11:14:55 +0000